Weather on September 18 at Redwood
Redwood National and State Parks
Based on 55 years of data from Eureka, CA
Planning Your Visit
September 18th in Redwood National Park (via Eureka, CA) typically brings mild fall weather, with average highs around 64°F and lows near 52°F. Over 55 years of records, the warmest September 18th was in 1977 (65°F average), while the coldest was 1971 (51°F) — a 14°F range across recorded history. Rain or other precipitation has occurred on about 33% of September 18th dates historically, with the wettest September 18th recording 3.68" of rain. The last decade has been 2.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.7°F warmer on this date compared to 20-30 years ago.
Planning for September 18th in Redwood? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 62°F | 56°F | 0.03" | 0" |
| 2024 | 64°F | 54°F | 0" | 0" |
| 2023 | 62°F | 55°F | 0.05" | 0" |
| 2022 | 66°F | 54°F | 0.89" | 0" |
| 2021 | 66°F | 55°F | 1.98" | 0" |
| 2020 | 72°F | 57°F | 0.3" | 0" |
| 2019 | 69°F | 56°F | 0.18" | 0" |
| 2018 | 61°F | 51°F | 0" | 0" |
| 2017 | 68°F | 57°F | 0.18" | 0" |
| 2016 | 67°F | 53°F | 0" | 0" |
| 2015 | 64°F | 52°F | 0" | 0" |
| 2014 | 71°F | 59°F | 0" | 0" |
| 2013 | 66°F | 51°F | 0" | 0" |
| 2012 | 62°F | 47°F | 0" | 0" |
| 2011 | 64°F | 46°F | 0" | 0" |
| 2010 | 64°F | 56°F | 1.57" | 0" |
| 2009 | 68°F | 55°F | 0" | 0" |
| 2008 | 66°F | 50°F | 0" | 0" |
| 2007 | 64°F | 50°F | 0" | 0" |
| 2006 | 65°F | 48°F | 0" | 0" |
| 2005 | 55°F | 50°F | 0" | 0" |
| 2004 | 66°F | 50°F | 0.79" | 0" |
| 2003 | 65°F | 44°F | 0" | 0" |
| 2002 | 70°F | 54°F | 0" | 0" |
| 2001 | 57°F | 51°F | 0.03" | 0" |
| 2000 | 75°F | 52°F | 0" | 0" |
| 1999 | 59°F | 50°F | 0" | 0" |
| 1998 | 69°F | 54°F | 0.03" | 0" |
| 1997 | 67°F | 49°F | 0" | 0" |
| 1996 | 64°F | 52°F | 0" | 0" |
| 1995 | 63°F | 52°F | 0" | 0" |
| 1994 | 61°F | 56°F | 0" | 0" |
| 1993 | 60°F | 53°F | 0" | 0" |
| 1992 | 58°F | 48°F | 0" | 0" |
| 1991 | 63°F | 48°F | 0" | 0" |
| 1990 | 67°F | 59°F | 0" | 0" |
| 1989 | 63°F | 52°F | 0" | 0" |
| 1988 | 64°F | 42°F | 0" | 0" |
| 1987 | 61°F | 49°F | 0" | 0" |
| 1986 | 63°F | 52°F | 1.45" | 0" |
| 1985 | 62°F | 48°F | 0" | 0" |
| 1984 | 68°F | 53°F | 0" | 0" |
| 1983 | 67°F | 49°F | 0" | 0" |
| 1982 | 65°F | 51°F | 0.64" | 0" |
| 1981 | 71°F | 52°F | 0.51" | 0" |
| 1980 | 67°F | 50°F | 0.05" | 0" |
| 1979 | 68°F | 54°F | 0" | 0" |
| 1978 | 57°F | 47°F | 0.33" | 0" |
| 1977 | 75°F | 55°F | 3.68" | 0" |
| 1976 | 57°F | 51°F | 0" | 0" |
| 1975 | 59°F | 46°F | 0" | 0" |
| 1974 | 56°F | 46°F | 0" | 0" |
| 1973 | 65°F | 56°F | 0.08" | 0" |
| 1972 | 63°F | 54°F | 0" | 0" |
| 1971 | 54°F | 49°F | 0" | 0" |